@ITman good article/photos.
Are there any other photos knocking about actually showing this "Evidence of large current" as shown/mentioned in the 1st diagram in
Accident: ANA B788 near Takamatsu on Jan 16th 2013, battery problem and burning smell on board - specifically between the battery contactor and the BDM?
With "high current" indications occurring before the blocking diode, it points to either an under spec'd design/components which cannot handle the design loadings, or 'something' has drawn excessive current through this area during the meltdown. I would therefore be very interested to see a before and after shot of this area / component if one exists.
The battery case earth (ground) wire looks like it may have blown similar to a fuse, so it would be nice to see if the actual battery ground wire has also suffered "high current" events as well.